Contents
How can I map an int to a corresponding string in C?
If your strings are known at compile-time, then you can do this in C: If your numbers and strings are constant, a map will not work; it has has to be loaded. And for a large quantity, use a binary search algorithm; otherwise a linear search is about as fast (as long as the array is sorted).
How to access map value by Index in C + +?
That way, you can access both the key and the value of each element of your map by index without storing either of them again. Of course, you’d still need to keep the vector synchronized to the map – append iterator on insertion, remove iterator (O(N)) before deletion.
Can a string be referenced by Index in a C string?
This is not the simplest way to achieve the desired outcome; however, it does demonstrate the fundamentals of what a string is in C. I shall leave you to read up on what I’ve done and why. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid …
How to map a string to an internal type?
Lets say for some reason the designer wanted things to be a little bit human readable so this “Type” column is a varchar (30). When you read this string in you need to parse it into some internal type within your application. What method do you use? std::vector and use the index as your enum type?
How to access an element in a const map?
I tried to use the operator [] access the element in a const C++ map, but this method failed. I also tried to use “at ()” to do the same thing. It worked this time. However, I could not find any reference about using “at ()” to access element in a const C++ map. Is “at ()” a newly added function in C++ map? Where can I find more info about this?
How to get the begin iterator using map?
I can easily get the begin iterator using map::lower_bound. But how can I get an upper bound? Do I have to iterate the whole set starting at lower bound and check every key if it still starts with “Ab”?